How to Install a Wiring Harness for a Trailer on a 2009 Dodge Grand Caravan

Today on this 2009 Dodge Grand Caravan we will be installing wiring harness part number 118552. The first thing we want to do is locate the ports for the wiring harness. The ports are located directly behind the tail light assembly on both sides of the vehicle. So we want to remove both of the tail lights from the vehicle to gain access. To do so we need to remove the two inboard screws here on the tail light assembly. :19

We want to gently rock and pry away because there are two outboard clips here on the tail light as well that need to release. With the tail light removed, you can see the port we are going to be using is in the middle. The black one here in the middle. We are going to take the red clip here at the top and pull it out. I am going to go ahead and remove both of these and set the tail light off to the side. :40

And next we will take our harness and start plugging it in line. What we want over here on the drivers side, we want to ports with the yellow and brown wires on them. We are just going to go ahead and connect that in line, in between the harness side and the tail light side. You will also note that on this connector here we have a white wire with a ring terminal on it, this is our ground wire. We are going to need to secure it to the back side of the tail light housing here into the metal. We are going to do that by using a self tapping screw that is provided with our wiring harness. Then next we want to take the red wire that is attached to our modulite box, this is going to be our hot lead going up to the battery, we want to attach it to the long black lead that is provided in our installation kit. To attach the two we want to simply strip back a little bit of the jacketing and the wire in the butt connector and crimp that down. You want to do the same thing for the black wire as well. Strip back some jacketing, it into the other end of the butt connector and crimp it down. I will not hurt to put some electrical tape around there. 1:55

So next we are going to take the passenger side connector, the 4-pole, and the large black lead and feed it through the opening in between the body of the vehicle and the bumper. That is going to allow us to access them from underneath the vehicle and route them to their appropriate locations. Lastly here on the drivers side, we want to take the modulite box, as you can see here we have double sided adhesive tape on the back. It will help to clean off the area to be sure it adheres properly and adhere it to the back side of the tail light housing area here. Peel that back and stick it right here. From there we can plug our two ports back in to the back of the tail light assembly. And once we reinstall it we will go underneath the vehicle and route our wires. Underneath the vehicle we are going to start by routing to 4-pole, we are going to route it to the center here and just tie it off at our trailer hitch. There are a couple fascia straps underneath here that will provide a good area to route our wires behind. We are going to take the passenger side plug and go ahead and route it all the way across and up through the opening in between the vehicle and the tail light. I am just using a piece of light gauge wire here to help pull my wires up to the passenger side tail light assembly. You want to make sure you keep this wire away from the exhaust as much as possible so that it does not get damaged. And then once you have connected the ports here on the passenger side you can go ahead and reassemble the tail light assembly. 3:53

Now we are going back underneath the vehicle and routing our wire up to the front to connect to the battery. All right now we are up inside the engine compartment with our wire routed up to the battery here. As you can see I have plenty of extra length here, so I am going to go ahead and cut some of this back. And what we are going to do is connect this wire to our fuse holder here. To do so we need to simply cut the wire in half on our fuse holder and simply strip back some of the jacketing here. To one end of the fuse holder we are going to be adding a ring terminal which we are going to connect to the positive terminal of the battery. And that is going to be connected to the black wire that was routed up from the back. And then I am going to take and wrap the butt connector in some electrical tape. And then we want to our fuse into the fuse holder. Okay from there our installation is complete. Again, if you have any loose wires that you may need to secure you can use the zip ties provided with the installation kit to do so. That will conclude the installation of wiring harness part number 118552 on a 2009 Dodge Grand Caravan.

Info for this part was:

Test Fit:Joe V

Video Edited:Zack K

Video Edited:Andrew K

Video Edited:Jacob T

Video Edited:Dustin K

Installed by:Cole B

Video by:Alan C

Video Edited:Sue W

Test Fit:Randy B

Video by:Chris R

Test Fit:Joe B

Video by:Zach D

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